45 lines
937 B
Awk
45 lines
937 B
Awk
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# ord.awk --- do ord and chr
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# Global identifiers:
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# _ord_: numerical values indexed by characters
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# _ord_init: function to initialize _ord_
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#
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# Arnold Robbins, arnold@skeeve.com, Public Domain
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# 16 January, 1992
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# 20 July, 1992, revised
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BEGIN { _ord_init() }
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function _ord_init( low, high, i, t)
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{
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low = sprintf("%c", 7) # BEL is ascii 7
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if (low == "\a") { # regular ascii
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low = 0
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high = 127
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} else if (sprintf("%c", 128 + 7) == "\a") {
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# ascii, mark parity
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low = 128
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high = 255
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} else { # ebcdic(!)
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low = 0
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high = 255
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}
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for (i = low; i <= high; i++) {
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t = sprintf("%c", i)
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_ord_[t] = i
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}
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}
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function ord(str, c)
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{
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# only first character is of interest
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c = substr(str, 1, 1)
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return _ord_[c]
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}
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function chr(c)
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{
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# force c to be numeric by adding 0
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return sprintf("%c", c + 0)
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}
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